DOUBLE-LAYER KILN WITH DOUBLE-TRACK EXTERNAL CIRCULATION LINE

Abstract

 The present invention discloses a double-layer kiln with a double-track external circulation line. by providing an inner track line and an outer track line cooperating with a lower kiln body and an upper kiln body to cyclically convey a sagger carrying a blank material to be sintered, the sagger and the blank material are moved and transported to a charging port of the kiln for loading, without manually moving and transporting the sagger and the blank material for loading, which can reduce manual labor intensity and improve loading efficiency and working efficiency of the kiln. The sagger is able to be exchanged and transported between the inner track line and the outer track line via a reversing mechanism, and when a time required for sintering the kiln is short and a loading frequency is fast, the lower kiln body and the upper kiln body are loaded and unloaded respectively via the inner track line and the outer track line so as to meet requirements for loading and unloading the kiln. However, when the blank material is sintered for a long time and the loading frequency is slow, a main conveying line of the inner track line is able to be stopped, and only a main conveying line of the outer track line cooperates with other conveying lines to load and unload two kilns, so that the purpose of energy saving can be achieved.

Description

[0001] The present disclosure claims the priority of the Chinese patent application filed on November 21st, 2023 before China National Intellectual Property Administration with the application number of 202311554681.1 and the title of "Double-layer Kiln with Double-track External Circulation Line", which is incorporated herein in its entirety by reference.

Technical Field

[0002] The present disclosure relates to the field of kiln plants, and in particular to a double-layer kiln with a double-track external circulation line.

Background Art

[0003] Traditional electric kilns mostly adopt a mode of single-channel and one-way operation. The products pass through a preheating zone, a heating zone, a high-temperature zone, a thermal insulation zone and a cooling zone in the electric kiln, and heating tubes are distributed on both sides of a sintered duct to heat the products in the kiln. Traditional electric kilns are widely used in the sintering of structural ceramics, functional ceramics, fluorescent powder, rare earth materials, lithium battery materials, magnetic materials, nanomaterials and other products. However, the electric kiln has low heat utilization and high energy consumption in the heating process, so improving the energy utilization efficiency of electric kiln has become the focus of energy saving and emission reduction in various industries.

[0004] Chinese patent CN205262173U discloses a double-layer sintering kiln, including a kiln, wherein an intermediate thermal insulation layer divides the kiln into two layers, and each layer successively has a preheating zone, a high-temperature zone and a cooling zone. The high-temperature zones of the upper and lower layers are located at a middle section of the kiln, the preheating zone of the upper layer and the cooling zone of the lower layer are located at a right side of the kiln, the preheating zone of the lower layer and the cooling zone of the upper layer are located at a left side of the kiln, and one cooling-air-driving blower is arranged in each cooling zone. The cooling zone of the upper layer is further provided with a cooling-hot-air-extraction blower for sending the cooling hot air to the preheating zone of the lower layer, and the cooling zone of the lower layer is provided with an opening hole in the intermediate thermal insulation layer for sending the hot air to the preheating zone of the upper layer. A moisture removal blower is provided in the preheating zone of each layer, each section of the kiln is provided with a roller-type conveying device, and two ends of the kiln are provided with walking platforms. The double-layer sintering kiln can achieve the technical purpose of saving energy. However, in the working process of the kiln, it is generally necessary to carry a blank material to be sintered through a sagger, and then convey the sagger and the blank material through a conveying line. When the kiln burns and shapes the blank material, it is necessary to remove the finished product in the sagger and place a new blank material, thereby reciprocating and repeating the conveying and sintering process.

[0005] However, in the above-mentioned patent, the conveying line is only provided at charging and discharging ports of the kiln for charging and discharging of the kiln, and the sagger cannot be circularly conveyed, so after the blank material is sintered and shaped, the staff is required to remove the sagger and the finished product at the discharging port of the kiln. When a new blank material is placed in the sagger, the sagger and the blank material are manually moved and conveyed to the charging port of the kiln for loading, which increases the manual labor intensity and reduces the working efficiency of the kiln.

Summary of the Invention

[0006] The object of the present disclosure is to propose a double-layer kiln with a double-track external circulation line, so as to overcome the above-mentioned technical problems in the prior art.

[0007] In order to solve the above-mentioned technical problem, the present disclosure provides a double-layer kiln with a double-track external circulation line, including a lower kiln body and an upper kiln body arranged in a double-layered manner from bottom up. An inner track line is mounted between a charging port and a discharging port of the lower kiln body, an outer track line is mounted between a charging port and a discharging port of the upper kiln body, and circulation conveying lines are formed in a surrounding manner both between the lower kiln body and the inner track line, and between the upper kiln body and the outer track line, for circularly conveying a sagger carrying a blank material to be sintered.

[0008] The inner track line includes an inner track main conveying line and an inner track charging and discharging line, the outer track line includes an outer track main conveying line and an outer track charging and discharging line, and both ends of the inner track main conveying line and the outer track main conveying line are in communication with each other via a reversing mechanism, such that two groups of circulation conveying lines are in communication with each other, and the sagger is able to be exchanged and conveyed between the two groups of circulation conveying lines.

[0009] The reversing mechanism includes a frame, a transverse conveying roller set, a longitudinal conveying roller set and a lifting assembly. The transverse conveying roller set and the longitudinal conveying roller set are distributed in a staggered manner on a top surface of the frame, and the longitudinal conveying roller set is mounted on the frame via the lifting assembly.

[0010] In an implementation, the inner track charging and discharging line includes an inner track charging line provided at a charging end of the lower kiln body and an inner track discharging line provided at a discharging end of the lower kiln body, wherein two sides of a charging end of the inner track charging line are respectively in communication with the inner track main conveying line and the reversing mechanism, and a discharging end of the inner track discharging line is in communication with another group of reversing mechanism.

[0011] In an embodiment, the outer track charging and discharging line includes an outer track charging line provided at a charging port of the upper kiln body and an outer track discharging line provided at a discharging port of the upper kiln body, a discharging elevating frame is mounted at a terminal end of the outer track discharging line, and one end of the discharging elevating frame is in communication with the outer track main conveying line. A terminal end of the outer track main conveying line is in communication with the reversing mechanism, a charging transfer line is connected and mounted on one side of the reversing mechanism, and a charging elevating frame is mounted between the charging transfer line and the outer track charging line.

[0012] In an embodiment, the transverse conveying roller set includes a plurality of roller shafts, a plurality of transverse conveying roller grooves and a transverse conveying drive unit. The plurality of transverse conveying roller grooves are distributed at an equal distance and opened on the top surface of the frame. The plurality of roller shafts are rotatably mounted in each of the transverse conveying roller grooves, and the plurality of roller shafts rotate synchronously under drive by the transverse conveying drive unit.

[0013] In an embodiment, the transverse conveying drive unit includes a main shaft, a transverse conveying motor and a plurality of first driven wheels. The main shaft is rotatably mounted on one side of the frame and is perpendicular to the transverse conveying roller groove, and the transverse conveying motor is fixedly mounted on one side of the frame and is in transmission connection with one end of the main shaft. The main shaft is provided with a plurality of first driving wheels corresponding to the transverse conveying roller grooves one by one. The plurality of first driven wheels are respectively fixedly mounted at one end of the plurality of roller shafts, and the first driving wheels are in transmission connection with the plurality of first driven wheels in corresponding transverse conveying roller grooves via a first transmission belt.

[0014] In an embodiment, the longitudinal conveying roller set includes a plurality of rollers and a plurality of longitudinal conveying roller grooves, wherein the plurality of longitudinal conveying roller grooves are distributed at an equal distance and opened on the top surface of the frame, and the plurality of longitudinal conveying roller grooves and the plurality of transverse conveying roller grooves are distributed in a staggered manner. End plates are slidably mounted at both ends inside each of the longitudinal conveying roller grooves, and the roller is rotatably mounted between two end plates.

[0015] In an embodiment, the lifting assembly includes a support plate, wherein the support plate is fixedly mounted on an upper end of the frame, a lifting column is fixedly mounted on a top surface of the support plate, a lifting plate is fixedly mounted on a top end of the lifting column, and a bottom end of the end plate is fixedly mounted on a top surface of the lifting plate.

[0016] In an embodiment, one side of the frame is provided with a transmission groove vertically distributed with the longitudinal conveying roller groove, the transmission groove is in communication with the longitudinal conveying roller groove via a lifting chute, one end of the roller extends into the transmission groove through the lifting chute, a synchronization wheel is fixedly mounted at an end of the roller, and a plurality of synchronization wheels are in transmission connection via a synchronization belt. A longitudinal conveying motor is fixedly mounted on the top surface of the lifting plate, a second driving wheel is mounted on an output shaft of the longitudinal conveying motor, a second driven wheel is fixedly mounted on an end of one of the rollers, and the second driving wheel is in transmission connection with the second driven wheel via a second transmission belt.

[0017] In an embodiment, a locking mechanism is mounted on the frame is further for clamping and limiting the roller, the locking mechanism includes a positioning plate and a lifting sliding block, the lifting sliding block is slidably mounted in a lifting chute, and the lifting sliding block is rotatably connected to an end of the roller. The positioning plate is fixedly mounted on an upper end of the lifting chute, a lifting shaft is slidably mounted on the positioning plate, a bottom plate is fixedly mounted on a bottom of the lifting shaft, a lifting seat is fixedly mounted on a top end of the lifting shaft, a connecting rod is rotatably mounted on each of both ends of the lifting seat, one end of the connecting rod is inclined upwards and is rotatably connected to a lever, the lever is rotatably mounted on the frame, and a bottom end of the lever is rotatably mounted with a clamping block located on one side of the lifting chute.

[0018] In an embodiment, a lower end of the lifting shaft is sheathed with a spring abutting between the positioning plate and the bottom plate.

[0019] The present disclosure has the following advantageous effects.

1. In the present disclosure, the inner track line is mounted between the charging port and the discharging port of the lower kiln body, and the outer track line is mounted between the charging port and the discharging port of the upper kiln body, such that the circulation conveying line is formed around both between the lower kiln body and the inner track line and between the upper kiln body and the outer track line for circularly conveying the sagger carrying the blank material to be sintered, and the sagger and the blank material are moved and conveyed to the charging port of the kiln for loading, without manually moving and conveying the sagger and the blank material for loading, thereby reducing the manual labor intensity and improving the loading efficiency and the working efficiency of the kiln.

2. In the present disclosure, both ends of the inner track main conveying line and the outer track main conveying line are in communication with each other via the reversing mechanism, such that the two groups of circulation conveying lines are in communication with each other, and the sagger is able to be exchanged and conveyed between the two groups of circulation conveying lines. When a time required for sintering the kiln is short and a loading frequency is fast, the lower kiln body and the upper kiln body are loaded and unloaded respectively via the inner track line and the outer track line so as to meet requirements for loading and unloading the kiln. However, when the blank material is sintered for a long time and the loading frequency is slow, the main conveying line of the inner track line is able to be stopped, and only the main conveying line of the outer track line cooperates with other conveying lines to load and unload two kilns, so that the purpose of energy saving can be achieved.

3. The longitudinal conveying roller set of the reversing mechanism of the present disclosure is mounted to the frame through the lifting assembly that drives the longitudinal conveying roller set down below the transverse conveying roller set when the sagger and the blank material are conveyed by the transverse conveying roller set, thereby preventing the longitudinal conveying roller set from interfering with the transverse conveying roller set. Accordingly, as the longitudinal conveying roller set conveys the sagger and the blank material, the lifting assembly drives the longitudinal conveying roller set upward to a position higher than the transverse conveying roller set. A height of the longitudinal conveying roller set is adjusted by the lifting assembly to enable the longitudinal conveying roller set and the transverse conveying roller set to be staggered up and down, so as to prevent friction resistance of the other roller set from interfering with the conveying of the sagger during the conveyance work of the transverse conveying roller set and the longitudinal conveying roller set, and ensure that the reversing mechanism is able to stably convey the sagger and the blank material.

4. In the present disclosure, the frame is mounted with THE locking mechanism for clamping and limiting the rollers in the longitudinal conveying roller set, and when the longitudinal conveying roller set carries out conveying work upwards, the locking mechanism clamps and limits the lifting sliding block where the rollers are located, thereby improving the stability of the lifting sliding block and the roller installation, further improving the stability of the conveyance of the longitudinal conveying roller set, and preventing the rollers from shaking when the longitudinal conveying roller set performs conveyance.

[0020] It certainly would be understood that it is not necessary for any product embodying the present disclosure to achieve all of the advantages described above simultaneously.

Brief Description of the Drawings

[0021] In order to explain the technical solutions in the embodiments of the present disclosure more clearly, the following contents will briefly introduce the drawings which need to be used in the embodiments. It would be obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is possible for a person skilled in the art to obtain other drawings according to these drawings provided without involving any inventive effort.

Fig. 1 is a three-dimensional schematic structural view of a double-layer kiln of the present disclosure;

Fig. 2 is a partially enlarged schematic structural view at A in Fig. 1 of the present disclosure;

Fig. 3 is a three-dimensional schematic structural view of a reversing mechanism of the double-layer kiln of the present disclosure;

Fig. 4 is a first three-dimensional sectional schematic structural view of the reversing mechanism of the present disclosure;

Fig. 5 is a partially enlarged schematic structural view at B in Fig. 4 of the present disclosure;

Fig. 6 is a partially enlarged schematic structural view at C in Fig. 4 of the present disclosure;

Fig. 7 is a second three-dimensional sectional schematic structural view of the reversing mechanism of the present disclosure;

Fig. 8 is a partially enlarged schematic structural view at D in Fig. 7 of the present disclosure;

Fig. 9 is a schematic structural view showing the mounting of a longitudinal conveying roller set on a frame in the reversing mechanism of the present disclosure; and

Fig. 10 is a partially enlarged schematic structural view at E in Fig. 9 of the present disclosure.

Detailed Description of the Invention

[0022] The embodiments of the present disclosure will now be described more clearly and fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure are shown. It is to be understood that the embodiments described are only a few, but not all embodiments of the disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without inventive effort fall within the scope of the present disclosure.

[0023] In the description of the present disclosure, it should be noted that the terms "opening hole", "upper", "lower", "top", "intermediate", "inner", etc. indicate an orientation or positional relationship, are merely to facilitate the description of the present disclosure and simplify the description, and do not indicate or imply that the assemblies or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and thus should not be construed as limiting the present disclosure.

[0024] Referring to Figs. 1 and 2, the present disclosure is a double-layer kiln with a double-track external circulation line, including a lower kiln body 1 and an upper kiln body 2 arranged in a double-layered manner from bottom up. An inner track line 3 is mounted between a charging port and a discharging port of the lower kiln body 1, an outer track line 4 is mounted between a charging port and a discharging port of the upper kiln body 2, and circulation conveying lines are formed in a surrounding manner both between the lower kiln body 1 and the inner track line 3 and between the upper kiln body 2 and the outer track line 4 for circularly conveying a sagger carrying a blank material to be sintered. The inner track line 3 includes an inner track main conveying line 31 and an inner track charging and discharging line, and the outer track line 4 includes an outer track main conveying line 41 and an outer track charging and discharging line. Both ends of the inner track main conveying line 31 and the outer track main conveying line 41 are in communication with each other via a reversing mechanism 5, such that two groups of circulation conveying lines are in communication with each other, and the sagger is able to be exchanged and conveyed between the two groups of circulation conveying lines. The reversing mechanism 5 includes a frame 51, a transverse conveying roller set, a longitudinal conveying roller set and a lifting assembly. The transverse conveying roller set and the longitudinal conveying roller set are distributed in a staggered manner on a top surface of the frame 51, and the longitudinal conveying roller set is mounted on the frame 51 via the lifting assembly. In the present disclosure, the inner track line 3 and the outer track line 4 cooperate with the lower kiln body 1 and the upper kiln body 2 to circularly convey the sagger carrying the blank material to be sintered, and move and transport the sagger and the blank to a charging port of the kiln for loading, without manually moving and transporting the sagger and the blank material for loading, thereby reducing a manual labor intensity and improving a loading efficiency and a working efficiency of the kiln. The reversing mechanism 5 exchanges and transports the sagger between the inner track line 3 and the outer track line 4, and when a time required for sintering the kiln is short and the loading frequency is fast, the inner track line 3 and the outer track line 4 respectively load and unload the lower kiln body 1 and the upper kiln body 2, so as to meet requirements of the loading and unloading of the kiln. When the sintering time of the blank material is long and the loading frequency is slow, the main conveying line of the inner track line 3 is able to be stopped, and only the main conveying line of the outer track line 4 cooperates with other conveying lines to load and unload the two kilns, so that the purpose of saving energy can be achieved. When the sagger and blank material are conveyed by the transverse conveying roller set in the reversing mechanism 5, the longitudinal conveying roller set is moved down to a position lower than the transverse conveying roller set by the lifting assembly. Accordingly, as the longitudinal conveying roller set conveys the sagger and the blank material, the lifting assembly drives the longitudinal conveying roller set upward to a position higher than the transverse conveying roller set. A height of the longitudinal conveying roller set is adjusted by the lifting assembly to enable the longitudinal conveying roller set and the transverse conveying roller set to be staggered up and down, so as to prevent friction resistance of the other roller set from interfering with the conveying of the sagger during the conveyance work of the transverse conveying roller set and the longitudinal conveying roller set, and ensure that the reversing mechanism 5 is able to stably convey the sagger and the blank material.

[0025] Referring to Fig. 1, in one embodiment, the inner track charging and discharging line includes an inner track charging line 32 provided at a charging end of the lower kiln body 1 and an inner track discharging line 33 provided at a discharging end of the lower kiln body 1. Two sides of the charging end of the inner track charging line 32 are in communication with the inner track main conveying line 31 and the reversing mechanism 5 respectively. The discharging end of the inner track discharge line 33 is in communication with another group of reversing mechanism 5; the reversing mechanism 5 transfers the sagger conveyed from the inner track discharging line 33 to the inner track main conveying line 31 through the transverse conveying roller set when the conveyance, loading and unloading are respectively performed through the two track lines. After loading is performed on the inner track main conveying line 31, the sagger and blank material are conveyed into the lower kiln body 1 for sintering by the inner track charging line 32. When only one track line is opened and the inner track main conveying line 31 is stopped, the reversing mechanism 5 conveys the sagger conveyed from the inner track discharging line 33 to the outer track main conveying line 41 through the longitudinal conveying roller set. After loading is performed on the outer track main conveying line 41, the sagger and blank material are conveyed to the inner track charging line 32 by the reversing mechanism 5 at the terminal end of the outer track main conveying line 41, and finally the sagger and blank material are conveyed to the lower kiln body 1 for sintering by the inner track charging line 32.

[0026] Referring to Fig. 1, in one embodiment, the outer track charging and discharging line includes an outer track charging line 44 provided at a charging port of the upper kiln body 2 and an outer track discharging line 45 provided at a discharging port of the upper kiln body 2. A discharging elevating frame 46 is mounted at a terminal end of the outer track discharging line 45, and one end of the discharging elevating frame 46 is in communication with the outer track main conveying line 41; a terminal end of the outer track main conveying line 41 is in communication with the reversing mechanism 5. A charging transfer line 42 is connected and mounted on one side of the reversing mechanism 5, and a charging elevating frame 43 is mounted between the charging transfer line 42 and the outer track charging line 44. The sagger on the outer circulation line is circularly conveyed among the outer track main conveying line 41, the reversing mechanism 5, the charging transfer line 42, the charging elevating frame 43, the upper kiln body 2, the outer track discharging line 45, and the discharging elevating frame 46, so as to perform loading and unloading and sintering of the blank material.

[0027] Referring to Figs. 3-6, in one embodiment, the transverse conveying roller set includes a plurality of roller shafts 52, a plurality of transverse conveying roller grooves 54, and a transverse conveying drive unit. In an implementation. The plurality of transverse conveying roller grooves 54 are distributed at an equal distance and opened on the top surface of the frame 51, the plurality of roller shafts 52 are rotatably mounted in each of the transverse conveying roller grooves 54, and the plurality of roller shafts 52 rotate synchronously under drive by the transverse conveying drive unit. The transverse conveying drive unit includes a main shaft 57, a transverse conveying motor 511 and a plurality of first driven wheels 510, wherein the main shaft 57 is rotatably mounted on one side of the frame 51 and is vertically distributed with the transverse conveying roller groove 54, and the transverse conveying motor 511 is fixedly mounted on one side of the frame 51 and is in transmission connection with one end of the main shaft 57. The main shaft 57 is fixedly mounted with a plurality of first driving wheels 58 corresponding to the transverse conveying roller grooves 54 one by one, the plurality of first driven wheels 510 are respectively fixedly mounted at one end of the plurality of roller shafts 52. The first driving wheels 58 are in transmission connection with the plurality of first driven wheels 510 in corresponding transverse conveying roller grooves 54 via a first transmission belt 59.

[0028] When the transverse conveying roller set works, the main shaft 57 is driven to rotate by the transverse conveying motor 511, so that the plurality of first driving wheels 58 on the main shaft 57 are driven to rotate synchronously. When the first driving wheels 58 rotate, the plurality of first driven wheels 510 and the roller shafts 52 in the corresponding transverse conveying roller grooves 54 are driven to rotate through the first transmission belt 59, such that all of the roller shafts 52 on the frame 51 are driven to rotate synchronously for transversal conveyance of the sagger thereon.

[0029] Referring to Figs. 7-10, in one embodiment, the longitudinal conveying roller set includes a plurality of rollers 53 and a plurality of longitudinal conveying roller grooves 55, wherein the plurality of longitudinal conveying roller grooves 55 are distributed at an equal distance and opened on the top surface of the frame 51, and the plurality of longitudinal conveying roller grooves 55 and the plurality of transverse conveying roller grooves 54 are distributed in a staggered manner. End plates 512 are slidably mounted at both ends inside each of the longitudinal conveying roller grooves 55, and the roller 53 is rotatably mounted between two end plates 512. The lifting assembly includes a support plate 56 fixedly mounted to an upper end of the frame 51. A lifting column 516 is fixedly mounted on a top surface of the support plate 56, and a lifting plate 515 is fixedly mounted on a top end of the lifting column 516. A bottom end of the end plate 512 is fixedly mounted on a top surface of the lifting plate 515; one side of the frame 51 is provided with a transmission groove 513 vertically distributed with the longitudinal conveying roller groove 55. The transmission groove 513 is in communication with the longitudinal conveying roller groove 55 via a lifting chute 514, one end of the roller 53 extends into the transmission groove 513 through the lifting chute 514, and a synchronization wheel 521 is fixedly mounted at an end of the roller 53. A plurality of synchronization wheels 521 are in transmission connection via the synchronization belt 522. A longitudinal conveying motor 517 is fixedly mounted on the top surface of the lifting plate 515. A second driving wheel 518 is mounted on an output shaft of the longitudinal conveying motor 517, a second driven wheel 520 is fixedly mounted on an end of one of the rollers 53. The second driving wheel 518 is in transmission connection with the second driven wheel 520 via a second transmission belt 519;

[0030] Here, an initial height of the roller 53 is lower than a mounting height of the roller shaft 52 so that the roller 53 does not affect the conveyance work of the roller shaft 52. When the longitudinal conveying roller set is operated, the lifting plate 515 is first driven upward by the lifting column 516, such that the roller 53 is driven upward, and then the height of the roller 53 is adjusted such that a top of the roller 53 is slightly higher than a top of the roller shaft 52. Then the second driving wheel 518 is driven to rotate by the longitudinal conveying motor 517, and at this time, the second driving wheel 518 drives the second driven wheel 520 to rotate via the second transmission belt 519, thereby driving the roller 53 connected to the second driven wheel 520 to rotate, and at the same time, the roller 53 drives the roller 53 t[A1]o rotate synchronously via the transmission of the synchronization wheel 521 and the synchronization belt 522, so as to longitudinally convey the sagger thereon.

[0031] Referring to Figs. 7 and 8, in one embodiment, the frame 51 is further mounted with a locking mechanism 6 for clamping and limiting the roller 53. The locking mechanism 6 includes a positioning plate 63 and a lifting sliding block 68, the lifting sliding block 68 is slidably mounted in the lifting chute 514, and the lifting sliding block 68 is rotatably connected to an end of the roller 53. The positioning plate 63 is fixedly mounted on an upper end of the lifting chute 514, and a lifting shaft 61 is slidably mounted on the positioning plate 63. A bottom plate 64 is fixedly mounted on a bottom of the lifting shaft 61, and a lifting seat 62 is fixedly mounted on a top end of the lifting shaft 61. Both ends of the lifting seat 62 are rotatably mounted with a connecting rod 65, one end of which is inclined upward and rotatably connected with a lever 66. The lever 66 is rotatably mounted on the frame 51, and a bottom end of the lever 66 is rotatably mounted with a clamping block 67 located at one side of the lifting chute 514;

[0032] when the roller 53 moves upwards, the lifting sliding block 68 is driven to move upwards synchronously along the lifting chute 514, and when the roller 53 moves upwards to a working height, the lifting sliding block 68 moves the bottom plate 64 in abutment upwards, thereby driving the lifting shaft 61 and the lifting seat 62 to move upwards. During the upward movement of the lifting seat 62, the upper end of the lever 66 is pushed and moved outward by the connecting rod 65, so that the lower end of the lever 66 rotates and moves inward, so that the clamping blocks 67 on both sides of the lifting chute 514 are driven to move and close inward, and the lifting sliding block 68 is clamped and fixed, thereby improving the stability of the mounting of the lifting sliding block 68 and the roller 53.

[0033] Referring to Fig. 8, in one embodiment, a lower end of the lifting shaft 61 is sheathed with a spring abutting between the positioning plate 63 and the bottom plate 64. As the lifting sliding block 68 pushes the bottom plate 64 upward, the bottom plate 64 compresses the spring to retract to produce a restoring spring force. When the roller 53 drives the lifting sliding block 68 to restore downwards, the bottom plate 64 is no longer pushed and limited by the lifting sliding block 68, and at this time, the bottom plate 64 restores downwards under the action of the restoring spring force of the spring, thereby driving the lifting shaft 61 and the lifting seat 62 to move downwards and restore; and during the downward movement of the lifting seat 62, the upper end of the lever 66 is pulled inwards via the connecting rod 65, thereby rotating and moving the lower end of the lever 66 outwards, so as to drive the clamping blocks 67 on both sides of the lifting chute 514 to move outwards and open, so as to release the clamping on the lifting sliding block 68, thereby facilitating the downward movement and restoring of the lifting sliding block 68.

[0034] In the description of this specification, descriptions of the terms "an embodiment", "some examples", "specific examples", etc. mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above-mentioned terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0035] The preferred embodiments of the disclosure disclosed above are intended only to help illustrate the present disclosure. The preferred embodiments neither set forth all the details specifically nor limit the disclosure to the specific implementations described. Obviously, many modifications and variations are possible in light of the above-mentioned teaching. The embodiments were chosen and described in order to best explain the principles of the disclosure and its practical applications to thereby enable a person skilled in the art to best understand and utilize the present disclosure.

Claims

1. A double-layer kiln with a double-track external circulation line, comprising a lower kiln body (1) and an upper kiln body (2) arranged in a double-layered manner from bottom up, characterized in that an inner track line (3) is mounted between a charging port and a discharging port of the lower kiln body (1), an outer track line (4) is mounted between a charging port and a discharging port of the upper kiln body (2), and circulation conveying lines are surrounded between the lower kiln body (1) and the inner track line (3), and between the upper kiln body (2) and the outer track line (4) for circularly conveying a sagger carrying a blank material to be sintered;

in that the inner track line (3) comprises an inner track main conveying line (31) and an inner track charging and discharging line, the outer track line (4) comprises an outer track main conveying line (41) and an outer track charging and discharging line, and both ends of the inner track main conveying line (31) and the outer track main conveying line (41) are in communication with each other via a reversing mechanism (5)[A2], such that two groups of circulation conveying lines are in communication with each other, and the sagger is able to be exchanged and conveyed between the two groups of circulation conveying lines;

in that the reversing mechanism (5) comprises a frame (51), a transverse conveying roller set, a longitudinal conveying roller set and a lifting assembly, wherein the transverse conveying roller set and the longitudinal conveying roller set are distributed in a staggered manner on a top surface of the frame (51), and the longitudinal conveying roller set is mounted on the frame (51) via the lifting assembly;

in that the inner track charging and discharging line comprises an inner track charging line (32) provided at a charging end of the lower kiln body (1) and an inner track discharging line (33) provided at a discharging end of the lower kiln body (1), wherein two sides of a charging end of the inner track charging line (32) are respectively in communication with the inner track main conveying line (31) and the reversing mechanism (5), and a discharging end of the inner track discharging line (33) is in communication with another group of reversing mechanism (5);

in that the outer track charging and discharging line comprises an outer track charging line (44) provided at a charging port of the upper kiln body (2) and an outer track discharging line (45) provided at a discharging port of the upper kiln body (2), a discharging elevating frame (46) is mounted at a terminal end of the outer track discharging line (45), and one end of the discharging elevating frame (46) is in communication with the outer track main conveying line (41); and

in that a terminal end of the outer track main conveying line (41) is in communication with the reversing mechanism (5), a charging transfer line (42) is connected and mounted on one side of the reversing mechanism (5), and a charging elevating frame (43) is mounted between the charging transfer line (42) and the outer track charging line (44).

2. The double-layer kiln with a double-track external circulation line according to claim 1, wherein the transverse conveying roller set comprises a plurality of roller shafts (52), a plurality of transverse conveying roller grooves (54) and a transverse conveying drive unit, wherein the plurality of transverse conveying roller grooves (54) are distributed at an equal distance and opened on the top surface of the frame (51), the plurality of roller shafts (52) are rotatably mounted in each of the transverse conveying roller grooves (54), and the plurality of roller shafts (52) rotate synchronously under drive by the transverse conveying drive unit.

3. The double-layer kiln with a double-track external circulation line according to claim 2, wherein the transverse conveying drive unit comprises a main shaft (57), a transverse conveying motor (511) and a plurality of first driven wheels (510), wherein the main shaft (57) is rotatably mounted on one side of the frame (51) and is perpendicular to the transverse conveying roller groove (54), the transverse conveying motor (511) is fixedly mounted on one side of the frame (51) and is in transmission connection with one end of the main shaft (57); and
a plurality of first driving wheels (58) is provided on the main shaft (57) and correspond to the transverse conveying roller grooves (54) one by one, the plurality of first driven wheels (510) are fixedly mounted at one end of the plurality of roller shafts (52) respectively, and the first driving wheels (58) are in transmission connection with the plurality of first driven wheels (510) in corresponding transverse conveying roller grooves (54) via a first transmission belt (59).

4. The double-layer kiln with a double-track external circulation line according to claim 2, wherein the longitudinal conveying roller set comprises a plurality of rollers (53) and a plurality of longitudinal conveying roller grooves (55), wherein the plurality of longitudinal conveying roller grooves (55) are distributed at an equal distance and opened on the top surface of the frame (51), and the plurality of longitudinal conveying roller grooves (55) and the plurality of transverse conveying roller grooves (54) are distributed in a staggered manner; and
end plates (512) are slidably mounted at both ends inside each of the longitudinal conveying roller grooves (55), and the roller (53) is rotatably mounted between two end plates (512).

5. The double-layer kiln with a double-track external circulation line according to claim 4, wherein the lifting assembly comprises a support plate (56), wherein the support plate (56) is fixedly mounted on an upper end of the frame (51), a lifting column (516) is fixedly mounted on a top surface of the support plate (56), a lifting plate (515) is fixedly mounted on a top end of the lifting column (516), and a bottom end of the end plate (512) is fixedly mounted on a top surface of the lifting plate (515).

6. The double-layer kiln with a double-track external circulation line according to claim 5, wherein one side of the frame (51) is provided with a transmission groove (513) vertically distributed with the longitudinal conveying roller groove (55), the transmission groove (513) is in communication with the longitudinal conveying roller groove (55) via a lifting chute (514), one end of the roller (53) extends into the transmission groove (513) through the lifting chute (514), a synchronization wheel (521) is fixedly mounted at an end of the roller (53), and a plurality of synchronization wheels (521) are in transmission connection via a synchronization belt (522); and
a longitudinal conveying motor (517) is fixedly mounted on the top surface of the lifting plate (515), a second driving wheel (518) is mounted on an output shaft of the longitudinal conveying motor (517), a second driven wheel (520) is fixedly mounted on an end of one of the rollers (53), and the second driving wheel (518) is in transmission connection with the second driven wheel (520) via a second transmission belt (519).

7. The double-layer kiln with a double-track external circulation line according to claim 5, wherein a locking mechanism (6) is mounted on the frame (51) for clamping and limiting the roller (53), the locking mechanism (6) comprises a positioning plate (63) and a lifting sliding block (68), the lifting sliding block (68) is slidably mounted in a lifting chute (514), and the lifting sliding block (68) is rotatably connected to an end of the roller (53); and
the positioning plate (63) is fixedly mounted on an upper end of the lifting chute (514), a lifting shaft (61) is slidably mounted on the positioning plate (63), a bottom plate (64) is fixedly mounted on a bottom of the lifting shaft (61), a lifting seat (62) is fixedly mounted on a top end of the lifting shaft (61), a connecting rod (65) is rotatably mounted on both ends of the lifting seat (62), one end of the connecting rod (65) is inclined upwards and is rotatably connected to a lever (66), the lever (66) is rotatably mounted on the frame (51), and a bottom end of the lever (66) is rotatably mounted with a clamping block (67) located on one side of the lifting chute (514).

8. The double-layer kiln with a double-track external circulation line according to claim 7, wherein a lower end of the lifting shaft (61) is sheathed with a spring abutting between the positioning plate (63) and the bottom plate (64).

Drawing